YOU SAID:

demonstratipn start at noon, room is dense and I can't see things.

INTO JAPANESE

デモンストレーションは正午から始まり、部屋は稠密で物事が見えません。

BACK INTO ENGLISH

The demonstration starts at noon, the room is dense and things can not be seen.

INTO JAPANESE

デモンストレーションは正午に始まり、部屋は稠密で物事は見えない。

BACK INTO ENGLISH

The demonstration starts at noon, the rooms are dense and things can not be seen.

INTO JAPANESE

デモンストレーションは正午に始まり、部屋は稠密で物事は見えません。

BACK INTO ENGLISH

The demonstration starts at noon, the rooms are dense and things are invisible.

INTO JAPANESE

デモンストレーションは正午に始まり、部屋は稠密で物事は見えません。

BACK INTO ENGLISH

The demonstration starts at noon, the rooms are dense and things are invisible.